Armored cable



C. L. JOHNSON.

AR'MORED CABLE;

APPLICATION FILED SEPT. a, 1919.

7 om'ree sures PATENT omce COLVIN L. JOHNSON, OF CHICAGO, ILLINOIS, ASSIGNOR TO JOHNSON AUTOHOBILE LOCK 00., OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

ARMORED CABLE.

Specification of Letters Patent. Patented 11111325, 1922.

Application filed September 8, 1919. Serial No. 322,482.

and State of Illinois, have invented certain new and useful Improvements in an Armored Cable; and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had ing of hardenedsteel for a cable of stranded mgs - illustrated in the to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to armored cables, and although not restricted to" such use, is particularly adapted "for use in connection with automobile tire looks or for other purposes where a padlock and chain is ordinaril employed. v

0a les as ordinarily constructed are readily cut through by files, hack saws or other cutting instruments, since hardness and flexibility are not'ordinarily associated. It is an object, therefore, of the present invention to provide a cable having a very hard surface and also possessing very con siderable flexibility.

Another object is to provide a flexible caswire or the like.

A further object of-the invention is to provide means for retaining the flexible cas mg in position on the cable.

. Other and further important objects of apparent from the disclosures in the specification and draw- Theinvention (sin a preferred form) is drawings and hereinafter more fully described.

On the drawings:

Figure 1 is a side yiew of an armored cable embodying the features of the present invention. v

Figure 2 isa side view of a portion of the armored cable.

Figure 3 is a section on the line 3--3 of Fi re 2.

s shown in the drawings:

The "-armored cable comprises a central flexiblecable, preferably of flexible stranded wire 2, such as steel, around which are arranged rings 3 of hardened steel. Each terminals so t ring is machined and afterwards. n

The 'ends'of each ring are spherically formed'so that each ring may rock or rothen case-hardened tate on the rings adjacent thereto. Further,

as the point about which the rings turn about each other by virtue of their spherical engaging surfaces is some distance from the ends of the-"rings the latter would normally tend to bind or cut the cable 2. Preferably, therefore', at least one end of the central aperture through each ring is countersunk or flared outwardly or otherwise enlarged,

as shown more particularly in Figure 3.

The construction shown in Figure 3 is particularly advantageous since the conical shaped aperture enables the ring to be accur'ately centered at one end on the cable while allowing full ring at the other end.

play for the cable and These rings 3 are held in place on the cable 2 by means of terminals 4 and'5, se-, cured to the ,ends of the cable 2 inany convenient manner. As shown, these termlnals are hollow and the hole therethrou h is countersunk at its outer end so that t e 'endof the cable may be spread out" and secured to the sides of'the .hole byiwelding,

When the soldering, brazing on the like. cable 2 is of steel wire and the terminals are also steel the two may be welded together by an oxy-acetylene torch, using nickel or a high carbon'steel. This welding is performed rior to thehardening of the at when the latter are casehardened the ends of. the cables are also case-hardened so that the terminals cannot be detached by drilling out the ends ofthe cables embedded therein.

As the chief purpose of the rings 3 is to prevent access'to the inner cable by cutting tools or to prevent wear of the inner cable, the external form of these rings 3 maybe varied within wide limits without. detracting from their utility. The rings 3 are formed with a series of annular projections thereon, as indicated in-Figures 2 and 3. This form of construction is particularly adapted for use with locking devices such as described in my patent for a lockingdevice No. 1,380,719, dated June 7, 1921.

I am aware that numerous details of construction may be varied through a. wide to each end of the cable to retain the rings in position thereon.

.2. An armored cable com risinga cable and a! series of circumferentlally ribbed cylindrical. member therearound having concave surfaces at one end and convex surfaces at the other end to permitthe cable to bend.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses. I

COLVIN JOHNSON.- Witnesses EARL M. HARDINE, LEROY D. KILnY. 

